Spring boot on Servlet 2.5 container

https://github.com/dsyer/spring-boot-legacy

http://stackoverflow.com/questions/22974475/does-spring-boot-support-servlet-2-5-auto-configuration

https://groups.google.com/forum/#!topic/google-appengine-stackoverflow/AQH-1fl3Oc4

http://docs.spring.io/spring-boot/docs/current/reference/html/howto-traditional-deployment.html

http://stackoverflow.com/questions/24435718/how-to-deploy-spring-boot-app-to-tomcat-6-servlet-2-5